This standard specifies the technology, test methods, inspection rules, marking, packaging and general principles for storage and transportation of bright zinc plating additives. JB/T 10339-2002 Technical conditions for bright zinc plating additives JB/T10339-2002 Standard download decompression password: www.bzxz.net
This standard specifies the technology, test methods, inspection rules, marking, packaging and general principles for storage and transportation of bright zinc plating additives.

ICS25.220.20
Machinery Industry Standard of the People's Republic of China
JB/T10339—2002
Technical conditions of addition agent for bright zinc plating2002-07-16 Issued
2002-12-01 Implementation
The State Economic and Trade Commission of the People's Republic of China Issued Foreword
Normative references
3 Technical requirements
3.1 Appearance.
3.2 Water solubility
Electroplating performance,
4 Test methods,
4.1 Appearance..
Water solubility.
Electroplating performance test
Inspection rules
Marking, packaging and storage and transportation
Electroplating performance technical requirements
Test basic solution formula
JB/T10339—2002
This standard is proposed by the China Machinery Industry Federation. Foreword
This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal and Non-metal Coverings. JB/T10339—2002
The drafting units of this standard are: Quality Supervision and Inspection Center of Surface Covering Layers of Machinery Industry, Wuhan Fengfan Surface Engineering Co., Ltd., Shanghai Yongsheng Additive Factory, Hebei Jinri Chemical Co., Ltd. The main drafters of this standard are: Zhong Lichang, Liu Renzhi, Shen Pinhua, Yin Zhenkun. II
1 Scope
Technical conditions for bright zinc plating additives
JB/T10339—2002
This standard establishes the general principles of technology, test methods, test rules, marking, packaging and storage and transportation of bright zinc plating additives. This standard is applicable to bright zinc plating additives for fluoride zinc plating, zincate zinc plating, ammonium salt zinc plating, amide zinc plating and sulfate zinc plating. Brightening additives for zinc alloy electroplating with a coating zinc content of ≥99% can also refer to this standard. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to investigate whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this standard. GB/T191 Pictorial marking of packaging storage and transportation (eqvISO780) Sampling and acceptance rules for chemical reagents
GB/T619
GB/T5270 Test method for adhesion strength of metal coatings (electrodeposited layers and chemically deposited layers) on metal substrates (eqvISO2819)GB/T15821
JB/T7704.1
JB/T7704.2
JB/T7704.3
JB/T 7704.4
Technical requirements
3.1 Appearance
Method for measuring the ductility of metal coating (eqvISo8401) Test method for electroplating solution Hall test
Covering ability test
Test method for electroplating solution
Cathode current efficiency test
Test method for electroplating solution
Test method for electroplating solution
Dispersion ability test
The additive should be a transparent or translucent liquid without precipitation and stratification. 3.2 Water solubility
The additive should be completely soluble in water.
3.3 Cloud point
The cloud point of the additive should not be lower than 65℃. Cyanide zinc plating and zincate zinc plating additives are not required to test the cloud point. 3.4 Electroplating performance
The electroplating performance of the additive should meet the technical requirements of Table 1. Table 1 Technical requirements for electroplating performance
Schneider trough test
Thickness
Dispersion
Cathode current efficiency
Coating gloss
Coating ductility
Cyanide zinc plating additives
≥90mm
≥20%
≥500
Technical requirements
Zincate zinc plating additives
≥70mm
≥25%
≥75%
≥500
Ammonium salt, chloride zinc plating additives||tt ||≥90mm
≥20%
≥95%
≥500
Sulfate zinc plating additives
≥50mm
≥15%
≥95%
≥450
≥3mm
JB/T10339—2002
Xenonide zinc plating additives
Coating bonding strength
Additive consumption
No separation between coating and substrate
Meet product requirements
Gloss value is a relative value.
bThe determination of ductility should adopt the cupping test method. 4 Test methods
4.1 Appearance
Table 1 (continued)
Technical requirements
Zincate zinc plating additives
No separation between the coating and the substrate
Meet the requirements specified in the product
Ammonium salt and oxide zinc plating additives
No separation between the coating and the substrate
Meet the requirements specified in the product
Sulfate zinc plating additives
No separation between the coating and the substrate
Meet the requirements specified in the product
At (25±2)℃, pour an appropriate amount of additives into a colorless and transparent glass container and observe under natural light. The result is qualified if it meets the requirements of 3.1 of this standard.
4.2 Water solubility
Put 5mL of additive into a colorless transparent glass container, dilute 50mL with distilled water or deionized water, shake well, and the result is qualified if it meets the requirements of 3.2 of this standard.
4.3 Cloud point
Prepare 500mL of zinc plating solution according to the corresponding formula of the test base solution in Table 2 and the amount of additives specified in the product instructions, place it in a constant temperature water bath, and gradually heat it until the plating solution becomes turbid. Record the temperature at which turbidity first appears, which is the cloud point temperature. The test should be carried out at least 3 times.
4.4 Electroplating performance test
The chemical reagents used in the electroplating performance test are chemically pure reagents, and the anode used is Zn-0 zinc plate (purity ≥99.99%). The test basic solutions for different zinc plating are shown in Table 2
Table 2 Test basic solution formula
Zinc sulfate
Zinc chloride
Potassium nitride
Ammonium chloride
Boric acid%
Zinc oxide| |tt||Sodium hydroxide
Sodium cyanide
Temperature ℃
4.4.1 Hall slot test
Cyanide zinc plating
, medium cyanide
Zincate zinc plating
Oxide
Acid zinc plating
Sulfate
According to the method specified in JB/T7704.1, electroplating at 1A current intensity for 10 minutes, there should be no leakage on the test piece. Electroplating at 2A current intensity for 10 minutes, the non-bright coating area at the low current density end should be less than 5mm from the edge of the low current density end, and the coating at the high current density end should be fully bright. It is qualified if it meets the above requirements. 4.4.2 Determination of deep plating ability
The test is carried out according to the inner hole method specified in JB/T7704.2. In the test, the cathode is placed vertically so that the central axis of the cathode tube is parallel to the anode.
4.4.3 Determination of dispersion ability
The test is carried out according to the near-far cathode method specified in JB/T7704.4. In the test, the K value should be 3. 4.4.4 Determination of cathode current efficiency
JB/T10339—2002
The test is carried out according to the method specified in JB/T7704.3. In the test, the cathode current density of the plating solution to be tested should be 2A/dm2. 4.4.5 Determination of coating gloss
4.4.5.1 Test instrumentsbzxZ.net
a) Gloss meter:
b) Laboratory electroplating equipment (rectifier, plating tank, timer, etc.). 4.4.5.2 Sample
Cold-rolled steel sheets with a thickness of 0.5mm~1mm are selected to prepare 100mm×50mm samples. After grinding and polishing, the surface roughness is 0.63um
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